Deadline reports that the 31-year-old actress has joined the hit CW show’s season three cast as Tatsu Yamashiro, a character that first appeared in the Green Arrow origin series graphic novels published by DC Comics.

Tatsu is “a Japanese martial arts expert who wields a deadly sword, a blade from which her codename Katana is derived. In Arrow, Tatsu will be one of Oliver’s mentors in the flashbacks and a critical influence on his journey to eventually become The Arrow of present day.”